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Laws of Motion ...

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  • Question 1
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    We can derive Newtons

  • Question 2
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    Which of the following statements is not true regarding the Newton's third law of motion?

  • Question 3
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    The driver of a car suddenly sees a broad wall in front of him. He should

  • Question 4
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    Which of the following statements is incorrect?

  • Question 5
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    Match Column I with Column II

  • Question 6
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    A rocket is going upwards with accelerated motion. A man sitting in it feels his weight increased 5 times his own weight. If the mass of the rocket including that of the man is 1.0 x 104 kg, how much force is being applied by rocket engine?(Take g = 10 m s-2).

  • Question 7
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    Ten one rupee coins are put on top of each other on a table. Each coin has a mass m. The reaction of the 6th coin (counted from the bottom) on the 7th coin is 

  • Question 8
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    A cork of mass 10 g is floating on water The net force acting on this cork is

  • Question 9
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     A stone of mass 1 kg is lying on the floor of a train which is accelerating with 1 m s-2. The net force acting on the stone is

  • Question 10
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    A stream of water flowing horizontally with a speed of 15 m s-1 gushes out of a tube of cross sectional area 10-2 m2 and hit a vertical wall normally. Assuming that it does not rebound from the wall, the force exerted on the wall by the impact of waler is

  • Question 11
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    A steam of water flowing horizontally with a speed of 25 m s-1 gushes out of a tube of cross sectional area 10-3 m2, and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water?

  • Question 12
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    A rocket with a lift-off mass 2 x 104 kg is blasted upwards with an initial acceleration of 5 m s-2. The initial thrust of the blast is (Take g = 10 m s-2)

  • Question 13
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    A ball of mass m strikes a rigid wall with speed u at an angle of 30o and get reflected with the same speed and at the same angle as shown in the figure. If the ball is in contact with the wall for time t, then the force acting on the wall is

  • Question 14
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    A rocket of initial mass 6000 kg ejects gases at a constant rate of 16 kgs-1 with constant relative speed of11 km s-1. What is the acceleration of the rocket one minute after the blast?

  • Question 15
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    Two billiard balls A and B. each of mass 50 g and moving in opposite directions with speed of 5 m s-1 each, collide and rebound with the same speed. The impulse imparted to each ball is 

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